Research Progress in Nitrogen Nutrient Adjustment to Ultra High Yield Wheat

Article Abstract: Protein content in wheat seed is closely correlated with nitrogen metabolic. Lots studies proved that nitrogen in wheat seed comes from both nitrogen absorption after anthesis and from revolving of vegetative nitrogen accumulation before anthesis. Most part of nitrogen in wheat seed comes from the revolving of the stored nitrogen before anthesis, while small part from the absorption after anthesis. In the revolving of the vegetative nitrogen protein degradation plays an important role and is related with the rise of hydrolytic enzyme activity. Thus, it is necessary not only to lay emphysis to improve nitrogen absorption ability in later growth stage, protein degradation in the leaves, eg nitrogen＇s revolving partition, needs the same attention. To select species with high efficiency ability in nitrogen absorption and assimilation after anthesis and with powerful revolving, it will improve seed yield and seed quality. In addition, wheat seed also shows nitrogen assimilation ability, so by means of nitrogen adjustment to photosynthesis, physiological activity, population quality, seed yield and seed weight, and influence to relationship between the storage, origin and discharge, it is possible to win high yield in wheat.